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Hydraulic Oil vs Engine Oil

Hydraulic oil transmits power in systems, while engine oil lubricates components. Using the right oil prevents damage and ensures efficiency. Mixing them compromises lubrication, risking engine health and voiding warranties.

  • 08 Apr 2025
  • 3 min read
  • 9 views

When it comes to taking care of our vehicle one important aspect to consider is selecting the right oil. We will come across two options; engine oil and hydraulic oil. Although they may appear similar at a glance, they serve different purposes in our vehicle. In this article, we will explore the disparities between hydraulic oil and engine oil, emphasising the significance of using the better one for optimal performance and durability of our car.

Engine Oil vs Hydraulic Oil

  • Primary Function

Hydraulic oil is primarily utilised in systems to transmit power and regulate components like brakes and steering systems.

On the other hand, engine oil is specifically designed to lubricate parts of the vehicle's engine, reducing friction and managing heat.

  • Additives and Properties

Hydraulic oil contains anti-wear additives that shield hydraulic components operating under high pressure.

Engine oil contains a blend of additives and detergents that cleanse, safeguard, and maintain the engine's functioning. These additives help prevent deposits, minimise damage, and extend the life span of the engine.

  • Compatibility

Hydraulic oil is formulated exclusively for use in hydraulic systems; it should never be used as a substitute for engine oil.

Engine oil has formulations tailored for gasoline or diesel engines. Therefore, using the suitable type is crucial for maintaining proper engine health.

  • Pressure Handling

Hydraulic systems operate under pressure and hydraulic oil is specifically designed to handle and transmit this pressure effectively.

On the other hand, engine oil operates under low-pressure conditions with its main focus on lubrication and cooling.

  • Temperature Range

Hydraulic systems can function in a wide range of temperatures and hydraulic oil is formulated to maintain its viscosity and performance in these varying conditions.

Engine oil however needs to maintain viscosity at temperatures since it plays a crucial role in providing adequate lubrication during cold starts as well as high-temperature operating conditions.

  • Colour and Appearance

Hydraulic oils have a pale colour, with a thinner consistency that makes them suitable for use in hydraulic systems.

Engine oils can have different colours but are typically amber to dark brown. They also tend to have a thicker consistency compared to hydraulic oil.

  • Maintenance Requirements

For hydraulic systems, regular monitoring and maintenance are steps to ensure proper functioning and prevent any potential leaks.

On the other hand, regular oil changes are essential for maintaining engine health and preventing wear and tear on engine components.

Conclusion

It is crucial to use the right type of oil for optimal vehicle performance and also for ensuring the longevity of our vehicle. Substituting one type of oil with another can lead to damage and expensive repairs. Furthermore, it's essential to mention that disregarding upkeep, which includes using the right oil, can have consequences on our car insurance protection. Car Insurance policies require vehicles to be sufficiently maintained to guarantee coverage in case of accidents or any other unforeseen incidents.


 

Disclaimer: The information provided in this blog is for educational and informational purposes only. It may contain outdated data and information regarding the Insurance industry and products. It is advised to verify the currency and relevance of the data and information before taking any major steps. ICICI Lombard is not liable for any inaccuracies or consequences resulting from the use of this outdated information.  

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